docs: def _parse_sibling(self, sibling, headers, data):
          """
          Parses a single sibling out of a response.
          """
  
          sibling.exists = True
  
          # Parse the headers...
          for header, value in headers:
              header = header.lower()
              if header == 'content-type':
                  sibling.content_type, sibling.charset = \
                      self._parse_content_type(value)
              elif header == 'etag':
                  sibling.etag = value
              elif header == 'link':
                  sibling.links = self._parse_links(value)
              elif header == 'last-modified':
                  sibling.last_modified = mktime_tz(parsedate_tz(value))
              elif header.startswith('x-riak-meta-'):
                  metakey = header.replace('x-riak-meta-', '')
                  sibling.usermeta[metakey] = value
              elif header.startswith('x-riak-index-'):
                  field = header.replace('x-riak-index-', '')
                  reader = csv.reader([value], skipinitialspace=True)
                  for line in reader:
                      for token in line:
                          token = decode_index_value(field, token)
                          sibling.add_index(field, token)
              elif header == 'x-riak-deleted':
                  sibling.exists = False
  
          sibling.encoded_data = data
  
          return sibling